The speed s (in miles per hour) of a car driving on dry asphalt can be given by s=4.74d√, where d is the stopping distance (in feet). What is the approximate stopping distance of a car traveling 55 miles per hour? Round your answer to the nearest hundredth.

Question

Mathematics

Beckham Choi

4 October, 22:00

The speed s (in miles per hour) of a car driving on dry asphalt can be given by s=4.74d√, where d is the stopping distance (in feet). What is the approximate stopping distance of a car traveling 55 miles per hour? Round your answer to the nearest hundredth.

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Answers (1)

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Davin Andersen · Answer 1

If (s) stands for speed and later in the question it says that the car was going 55 miles per hour you will replace the s in the equation with the number 55.

55=4.74d

Now you need to find (d)

If you look at this equation another way you will see that what it's saying is 4.74 x? Is 55

Because d replaces the question mark

So 55 divided by 4.74 is 11.603 which is the answer